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Remedy in case of faults
9. Remedy in case of faults
9.1 Gasoline engine
Type of malfunction
Gasoline engine does not
start up
9.2 Electric Motor
Type of malfunction
Unit does not start
HC 960 units:
Piston rod in the material
feed pump is not moving
up and down.
9.3 Hydraulic motor
Type of malfunction
Hydraulic motor stuck
in the lower position.
46
Possible cause
No gasoline.
ON/OFF switch to OFF.
Gasoline cock closed.
Engine problem.
Engine defective.
Oil level insufficient.
Possible cause
Indicator light does not indi-
cate unit has power.
The unit has switched off
automatically because of an
overload.
Direction of the rotation of
the electric motor is
incorrect
Possible cause
Outlet valve seat in the
material feed pump is
loose.
Reversing valve in the
hydraulic motor is stuck
or the upper or lower
hexagonal nut on the
valve rod has become
loose.
GB
Measures for eliminating the malfunction
Fill the gasoline tank.
Move the switch to ON.
Open the gasoline cock.
Please refer to the engine instructions.
Bring to the Honda service point.
Top off oil.
Measure for elimination of malfunction
Check power supply.
Wait 2 – 3 minutes, then turn the unit back on.
Turn the polarity changer in the power plug 180º.
Measure for elimination of malfunction
Ball valve on the material feed pump – lever position
vertical. Screw out sealing screw on hydraulic motor.
Press down reversing valve on hydraulic motor. Re-
mount sealing screw. Start unit. The piston rod moves
upward and then gets stuck in the lower position. The
cause is a loose outlet valve seat.
Take unit to a Wagner authorized service center.
HC 920 • HC 940 • HC 960
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